Recutting to AI chamber

Can I order a 6.5x55 chambered barrel & rechamber to AI without setting the barrel back? Thanks for any experience that you can share. Joe

Yes.

...and no.

For a perfect AI chamber, the neck/shoulder point is exactly the same on the parent case and the AI case.

On a Savage/Stevens, you can cut a touch deeper, IF necessary, but you are able to adjust your headspace with the barrel nut.

Worse case scenario, cut 20 or 30 thousandths off the chamber end of the barrel.

I wouldn't and don't. For the 2mins to face off .020" or so its well worth it to clean it up.

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Originally Posted by dcloco

For a perfect AI chamber, the neck/shoulder point is exactly the same on the parent case and the AI case.

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No, the neck shoulder junction on the AI chamber is .004" LESS than the parent.

That is why you use the parent GO guage as the AI NO/GO guage.

The AI GO guage is .004" shorter than the parent GO guage.

Old P.O. Ackley was pretty smart and he realized he needed a bit of crush to make the parent cartridge stay tight against the boltface.

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Originally Posted by Idahojoe

Can I order a 6.5x55 chambered barrel & rechamber to AI without setting the barrel back? Thanks for any experience that you can share. Joe

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only on some of the rimmed cases like .30-30. try it on a rimless case and you will most likely get a double angle shoulder.

order the right chamber or no chamber and save the cost of having it changed.

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order the right chamber or no chamber and save the cost of having it changed.

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+1

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Originally Posted by nsaqam

Quote:

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Originally Posted by dcloco

For a perfect AI chamber, the neck/shoulder point is exactly the same on the parent case and the AI case.

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No, the neck shoulder junction on the AI chamber is .004" LESS than the parent.

That is why you use the parent GO guage as the AI NO/GO guage.

The AI GO guage is .004" shorter than the parent GO guage.

Old P.O. Ackley was pretty smart and he realized he needed a bit of crush to make the parent cartridge stay tight against the boltface.

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Yep....he is correct. ...sorry for the snafu.

Quote:

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Originally Posted by nsaqam

No, the neck shoulder junction on the AI chamber is .004" LESS than the parent.

That is why you use the parent GO guage as the AI NO/GO guage.

The AI GO guage is .004" shorter than the parent GO guage.

Old P.O. Ackley was pretty smart and he realized he needed a bit of crush to make the parent cartridge stay tight against the boltface.

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You are 100% correct.

HEAD CLEARANCE (or the lack of it in this instance) on the parent cartridge in an improved chamber is established on the neck shoulder junction with a .004" crush fit.

http://i44.tinypic.com/9pna50.jpg

99.9% of the time simply reaming the parent chamber without setback creates something other than a true improved, a wildcat.

Bill

BillPa is the one who first told me this a few years ago now.

Thanks Bill!

Of note, you can adjust the headspace on Savage/Stevens barrels.

It was my party snafu on the spec, but this applies to non nutted barrels. :)

AND NUTTED, YOU HAVE TO HAVE THE CORRECT CHAMBER TO HEADSPACE FROM ALSO. :) darn cap lock, I'm not doing over!

Thanks a million, you guys have helped me a lot. Joe